7 Chemical Compound Quiz What do sand and water have in common from a chemical point of view?Oxygen
8 Numbers Less Than 1 Will Have A Negative Exponent. A millionth of a second is:sec 1 x 10-6 s1.0E-6 s x 10^-6 s
9 To Change Standard Form To Scientific Notation… Place the decimal point so that there is one non-zero digit to the left of the decimal point.Count the number of decimal places the decimal point has “moved” from the original number. This will be the exponent on the 10.If the original number was less than 1, then the exponent is negative. If the original number was greater than 1, then the exponent is positive.
10 Examples Given: 289 800 000 m Use: 2.898 m (moved 8 places) Answer: x 108 mEasier Way = M term smaller, so make n term larger to 108Given: mUse: m (moved 4 places)Answer: x 10-4 mEasier Way = M term larger, so make n term smaller to 10-4
11 To Change Scientific Notation To Standard Form… Simply move the decimal point to the right for positive exponent of 10.Move the decimal point to the left for negative exponent of 10.(Use zeros to fill in places.)
12 ExampleGiven: x 106 mAnswer: m (moved 6 places to the right)Easier Way = 106 to 100 = n smaller, so make M term larger!Given: x 10-4 mAnswer: m (moved 4 places to the left)Easier Way = to 100 = n larger, so make M term smaller!
13 Scientific Notation Let’s see if you can: Define scientific notationConvert numbers into scientific notationConvert scientific notation to a standard number
18 Scientific Notation At the conclusion of our time together, you should be able to: Multiply and divide numbers that are in scientific notationAdd and subtract numbers that are in scientific notation
19 Example #16 (3 x 102 m)(8 x 10-4 m) Answer: multiply M terms 24 Add n terms-224 x 10-2 m2Adjust to correct scientific notation2.4 x 10-1 m2Adjust to correct number of sig figs2 x 10-1 m2
20 Example #17 (5.000 x 105 m)/(3500 m) Answer: divide M terms 0.001 428 Subtract n terms5x 105Adjust to correct scientific notation1.428 x 102Adjust to correct number of sig figs1.4 x 102
21 Example #18 (5.0 x 104 m)(8.230 x 106 m) /(1.99 x 1018 m) Answer: multiply and divide M termsmAdd and subtract n terms-8x 10-8 mAdjust to correct scientific notationx 10-7 mAdjust to correct number of sig figs2.1 x 10-7 m
22 Example #13(5.0 x 10-3 m)-(5.0 x 10-8 m)Answer: can only subtract like powersAdjust to larger power(5.0 x 10-3 m)-( x 10-3 m) =x 10-3 mAdjust to correct number of decimal places5.0 x 10-3 mAdjust to correct scientific notation
23 Example #14 (5.0 x 10-3 m) + 0.774 m Answer: can only add like powers Adjust to larger power( x 100 m) m =mAdjust to correct number of decimal places0.779 mAdjust to correct scientific notation7.79 x 10-1 m
24 Example #15 (5.0 x 10-3 m) + (5.0 x 10-4 m) - 0.009 38 m Answer: can only add like powersAdjust to larger power( x 100 m) + ( m) – mmAdjust to correct number of decimal placesmAdjust to correct scientific notation-3.9 x 10-3 m
25 Surveillance should precede salientation. Familiar SayingSurveillance should precede salientation.Look before you leap!!!
26 Scientific Notation Let’s see if you can: Multiply and divide numbers that are in scientific notationAdd and subtract numbers that are in scientific notation